Centrifugal fan.



No. 666,466. PATLNTLD JULY 16, 1967.v R. HANCOCK 6 R. 1*. HALL.

CBNTRIPUGAL FAN.

APPLIGATION FILED 1166.13, 1906.'

4 SHEETS-SHEET 1.

WITNESSES GBNTRIPUGAL FAN.

APPLIUATION FILED DBO.13. 1906.

4 SHEETS-SHEET 2.

WITNES'SES` No. 660,465.v `1 ATBNTED JULY 16, 1,907.

R..HAN606K 6E R. F. HALL.

CENTRIPUGAL FAN.

APPLICATION FILED DEO. 13| 1908.

4 SHEETS-SHEET 3.

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. L) Id F /2 w sv TNEssEs lfwmfa W Re?, Z/v/o Hmz coc/ Egger ffe era c:Ha ZZ No. 660,465. A PATBNTED JULY 16, 1907. `R. HANCOCK 6L R. P. HALL.

CENTRIPUGAL PAN. AIfPLIoATIoN FILED 6110.13, 1906.

4 SHEETS-SHEET 4.

WITNESS ES UNITED STATES PATEIWI- OEEIOE.

' RALPH HANCOCK, OE LONDON, AND ROBERT FREDERICK HALL, OE BIRMINGHAM,ENGLAND.

GENTRIFUGAL FAN.

Neg. 860,465.

Specification of Letters Patent.l

Patented July 16, 1-907.

spplieeei'eenea Deeember 13,1906. seriel Ne. armas.

' ing Cross House, Charing Cross Road, London, W. C.,

the runner through a suction eye or opening in the cas-l ing whichincloses the said runner and is 'discharged centrifugally through theports or spaces between the runner blades, and is applicable to bothsinglesuction fans of the typewherein the suction eyeis arranged atoneside ofthe casing, and also to double suction eye fans wherein asuction opening is formed in each side of the casing andv two sets ofcentrifugalacting blades are arranged to project from the opposite sidesrespectively o f a single central disk and to be supported at theirouter ends byrings whose diameters approximate to t the diameters of thesuction eyes in the casing sides to .which they are respectivelyopposed. 1

The objects of the said invention are to increase the.

efficiency and utility or general adaptability o'fans of `this type bythe employment of runner blades of special construction, and by the useof a fan casing which is capable of being arranged so that it willdischarge the air delivered by the runner in any desired direction,without 'necessitating any substantial'modification or .l change. in thestructure of the casingitself, as is usually necessary.

. Figure lof the accompanying drawings represents an end elevation of acased centrifugal fan of the single "suction eye type constructed inaccordance with our.

invention and with the adaptable casing arranged to give afleft-handed,undercast delivery. Fig. v2 repre# Asents partly in section and partlyin elevation land upon an enlarged scale, the runner of the improved fanseparately. i Fig. 3 is across section of the complete fan uponthe samescale as Fig. 1. Fig. 4 is a longitudinal section, taken upon the dottedline rc3 Fig. 3. Fig. 5 shows an edge view ofono Of the spcial blades ofthe runner; Fig. 61s an elevation thereof; IFig. 7 'is a sectional viewof the same; Fig. 8 is a sectional view of a modification; Figs. 9 and10 are views of the fan with l the adaptable casing arranged to give anoblique up- 'werd discharge from theiea-hendeide; rige. 111e '1'6-- arefront vand side views of the fan casing in its various Y relativepositions.

The/same letters of reference indicate correspondi ing parts in theseveral figures of the drawings.

n. The runner frame of the improved fan consists of an end ring .orcircular plate 1, riveted to a central boss -4 or extended hub 2 whichis keyed-to the runner shaft and a second ang1e-iron ring 3 arranged atthe opposite end or side of the structure and supported ronrthe exftended hub by a series of stay arms 4 radiating at right angles from thesaid hub as shown in Figs, l and 3. Theseries of air-collecting anddischarge blades 5 are arranged transversely between the end supportsand are formed from sheet or wrought metal plates, pressed, stamped vorotherwise fashioned, and connected at their opposite extremitiesbyrivets or other astenings tothe said supports.

Each blade is of an undulatory figure in its longer direction so as toproduce therein a plurality of concaved or curved grooves 6 .runningacross the acting face-of the said plate at right angles to the lengthand this grooved or corrugated formation is compounded with thefashioning of each plate'into asingle curved configuration in crosssection as shown in Fig. 5 or a doublecurved configuration as shown inFig. 6 whereby their acting faces are spooned and the power andefficiency ofthe fan are increased as already described.

The open intake end of the runner is of approxivmately the same diameteras the suction eye 7 in the side 8 of the casing and it will beunderstood that the increased surface obtained by virtueof theundulatory section enables the blades to be provided, as it were,

with a series of pocketsadapted to hold the air in such A a way that itwill meet a very high pressure before slipping out, so that the air isretained in the blades and a larger quantity is discharged when thecentrifugal action takes place. Further air is picked up practicallyover the entire length of each blade and a very equal' discharge occursover the whole surface.,V the action being entirely different to thatwhich is Another advantage derived from the pocketing is' that they tendto prevent the rushing of the air towards the blank disk at the closedend of the runner and so checks ,any churning action while .the whole ofthe additional working surface lobtained by the special blade formationsiseffectively untilized in the work of retaining and projecting theair.

Thefan runner is mounted, as shown inthe drawings, within theI casing 9,which is constructed as a complete and .self containedlement, separate-from its i foundation bracket orpedestal 10 whichis alsoa separate andself-contained element, said `casing being so formed andarranged that itmay be set with its discharge outletv in any desiredpositionytaccordingto vthe type of fan required) with respcct'to thesaid -pedestal or .foundation bracket prior to'the ,two com casing isformed.

`curve commencing from a point which lies in the same plane as thecenter of the body portion wherein the- `runner is fitted `andterminating at a pointin the same plane as the commencement of the saidvolute curve. This formation produces on oneside of the casing aflatsurface ll'which is tangential to a circle struck from the center of therunner axis, and in this dat side or part the outlet or dischargeorifice 20 o the It will vbe obvious that by placing the casing with itsdischarge on either the right or left hand of the runner center and thenturning the same bodily around said centerto a greater or less degreethe casing may be set or arranged so as to discharge in any direction,and on bolting or securing the same to the base or foundation bracketafter such adjustment, a fan of either the undercast, overcast, downcastvertical delivery or oblique delivery type (such as shown in Figs. 6,v 7and 8) can be expeditiously produced or made up, and easily modified oraltered subsequently to another type if necessary.

The separately formed vbracket or foundation piece used in connectionwithlhe adaptable volute-shaped vcasingabove described may beconstructed in any convenient manner which will afford an effectivesupport and strengthen reinforce or stiffen the casing. The bracketshown in the drawings takes the form of a shoe-like structure andconsists of a pair of side plates l2 secured together and held in theirproper relative positionsand at the correct distance apart by stay bolts13 and having lengths of angle iron 14 riveted along 'the bottom edgesof their outer side to serve as feet or bearing flanges which afford arigid andextended support for the complete structure, while the innersides of the connected and laterally braced plates are provided withvbearer flanges l5 which may also be formed from lengths of angle iron,riveted to kthe said plates, after having been first bent to conform tothe curvature of iheparticular part of the voluted side 16 of the casingbody. which is to come within the shoe and which, when applied i suchdesired relative position to the said shoe, fits closely' againstvandtakes its seating upon the said bearer flanges, prior to the twocomponent elements of the structure being per' manently rivetedtogether. Or instead of the shoe or foundation bracket being constructedfrom sheet metal andangle iron components, it inay be made from ashoe-like casting into which the bottom or underside portin of thecasing is dropped and secured by riveting or otherwise.

It is obvious that the application of the herein described invention tofans of the double suction type differs in no essential respeet from itsapplication to a single suction type as herein described except that twosets of blades are employed all-d arrange'd respec-Y tiyely upon theopposite sides oi a single closed disk or plate and are supporicd'aitheir ouicr cnds by angle iron or similar rings: and that a suction c veor intake opening is formed in each side oi` the casing body in registerwith the'rcspective open or intake ends of the double runner.

Having'now fully de.-ribed my invention what I desire to claim, andsecure by Letters Patent is'.-

1. In a cased centrifugal fan: the combination with a casing having ularge intake or suction eye in one side, of :l runner consistingY of :iplurality of lou;r and narrowblades having un undulatory or zigzagformation longitudinaily and a curved radial [ovulation substantially:is described.

2. In :i cased centrifugal fzln; the combination with a casing' having nlarge intake or suction eye, ot' n runner which is arranged within thecasing and consisting of long and narrow blades arranged upon :i singledisk or plate;

'said blades being of :in undulntory or zig-zag formation longitudinally:1nd ot" a curved formation radially substantially :is described.

Il. 1n a c sed centrifugal fan: the combination with a casingr having':i ini-ge intake or suction eye in the one side, of u runner consistingot' n plurality of long.'` and narrow blades lniving :i series oi'laterally separated air pockets or spoon like parts produced by makingthe blades of an undulatory or zig-zug fornnitiony longitudinally and adouble curved cross section or radial formation laterally; said bladesbeing: attached :it the ends furthest removed from the suction eye ofthe casing upon n disk or plate supported by the fan axis while theirother endsare attached to a carrier ring. substantially as described.

-i. In a cased centrifugal fan; the combination with a casing having :ilarge intake or suction eye in the one side of :i runner consisting of aplurality of long and narrow.

blades having: un unduiatory or zigzag formation longitudinzilly andncurved formation radially, n disk or plate l'or supporting the innerends of said blades: a ringr for supporting. said blades; a hub carriedby the runner shaft, and a series of stay arms extending at right anglesfrom' snid hub iolthe binde-supportingring, substantially as described.

o. In a centrifugal t'an. the combination of arcasing a runnerconsisting' of a plurality of'long and narrow blades having anuudulatory formation longitudinally and s curved formation radially. anend plate associated with the blades for supporting' the sume, a ring'having con nection with the blades and arranged at the intake end of thecasihg, and a' foundation for adjustnbiy supporting the casing.

i. In a centrifugal fan. the combination of a casing having a dischargeoutlet, and an intake at one side thereof, u runner rotatably mounted inthe casing und consisting of a plurality of long and narrow blades'having' a zigzag formation longitudinally and a curved formaltionradially, :i disk for supportingT the inner ends of said blades. a ringfor supporting the opposite ends of the lutter. a runner shaft, aliulrhaving connection with the ring and disk nndassociated with theshaft, and afshoe supporting element forming a foundation for thecasing.

In. testimony whereof` we have Yhereunto set our hands -in presence oftwo subscribing witnesses.

RALPH HANCOCK.

ROBER'l` FREDERICK HALL.

Hall

